How does a teabag work for toothache relief? A teabag works because it has antibacterial properties
. You need to place a teabag in a cup, and add some boiled water. Let the water cool down to the point where it is not too hot for your mouth. Remove the teabag while it is still warm and place on the area that is affected by the pain. Bite down gently and hold it in the place where it is sore with your teeth, until you get relief. You should get relief within 20 to 30 minutes.